1145385481 has 2 divisors, whose sum is σ = 1145385482. Its totient is φ = 1145385480.

The previous prime is 1145385473. The next prime is 1145385497. The reversal of 1145385481 is 1845835411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1098325881 + 47059600 = 33141^2 + 6860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145385481 - 2³ = 1145385473 is a prime.

It is a super-2 number, since 2×1145385481² = 2623815800171202722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145385401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572692740 + 572692741.

It is an arithmetic number, because the mean of its divisors is an integer number (572692741).

Almost surely, 2^1145385481 is an apocalyptic number.

It is an amenable number.

1145385481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145385481 is an equidigital number, since it uses as much as digits as its factorization.

1145385481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The square root of 1145385481 is about 33843.5441554220. The cubic root of 1145385481 is about 1046.2863461397.

The spelling of 1145385481 in words is "one billion, one hundred forty-five million, three hundred eighty-five thousand, four hundred eighty-one".